Wooten-type locomotive-boiler.



l. T. ANTHONY.

WOOTEN TYPE LOCOMOTIVE BOILER.

APPLICATION FILED FEB. B. 1916.

Patent-ed .1.1.1612, 1917.

JEs r. ANTHONY, OE EAs'r ORANGE, NEW JERsEY, AssrNoR To AMERICAN ARCH COMPANY, or NEW YORK, N. Y., A CORPORATION OE DELAWARE.

WOOTEN-TYPE LOCOMOTIVE-BOILER.

Specification of Letters Patent.

Patented I une 12, 1917.

To all whom it may concern.'

Be it known that I, JAMES T. ANTHONY, a citizen of the United States, and a resident of East Orange, county of Essex, and State of New Jersey, have invented certain new and useful Improvements in and for Wooten-Type Locomotive-Boilers, of which the following is a specification.

My invention relates to improvements in locomotive boilers of the Wooten type which have rebox extensions within the barrel of the boiler forward of the grate.

The iirebox of a Wooten type boiler differs from others chiefly in the matter of its height. 'Ihe distance between the grate and the crown sheet' is much less than in locomotive fireboxes of other types. The reason of this peouliarity is that Wooten reboxes are designed for use with anthracite coal; a fuel which yields a very short llame, as oompared with others, and which therefore necessitates the arrangement of the chief heating surface (the crown sheet) close to the fuel bed. The height of the rebox extension, sometimes called the barrel combustion chamber, is determined by the height of the crown sheet as in other ireboxes. Another characteristic of a Wooten iirebox is that the grate is placed almost on a level with the floor of the extension, r

It is claimed for the Wooten type irebox that by reason of its low height there is a substantially equal distribution of the hot gases in the iiues of the boiler; and that this and the attendant easy maintenance of the fluesand the flue sheet, are advantages secured without material loss-of heating value inthe walls of the irebox, inasmuch as the latter are close to the fuel bed. Against the admitted advantages of such reboxes, I find that the How of hot gases from grate to fines is so rapid and direct that the rear part of a Wooten rebox is much less eective than supposed.

It has been suggested that a cure may be effected by providing Wooten iireboxes with inclined refractory arches of the kind used in bituminous coal burning locomotives and which in such locomotives have served to obviate disadvantages similar to those here mentioned as pertaining to Wooten nreboxes. But extensive experiments conducted in the past have made it appear that the lack of helght in theWooten lirebox, and its narrow throat sheet, prevent the practical and eiicient use of such arches. Wooten fireboxes of the extension type are therefore customarily used without arches A or baille walls of any kind.

The object of my invention is to provide within a Wooten type iirebox Aa dividing wall and arch which shall perform the same desirable dfunctions as the arches which are used in bituminous coal-burning fireboxes.

The manner in which I attain this object, and the nature and particulars of my invention, will be understood on reference to the drawings that form part of this specification, and in which:-Figure 1 is a longitudinal section of a Wooten type locomotive boiler embodying my invention on the line Y-Y of Fig. 2;- -and Fig. 2 is a transverse section thereof'on the line X-X of Fig. 1.

The familiar parts of a Wooten type firebox are as follows :-The boiler-barrel, 2 the irebox sheet, 3;-the mud ring, 4;-the side sheets, 5, 5;-the crown sheet, 6;-the rear sheet, 7;-side water legs, 8, 8;-the rear water leg, 9;-the fuel door, 10;-and throat sheet, 11;-the shallow front water leg, 12;-the flue sheet, 13;-and, the flues, 14. The grate, 15,' usually occupies the whole space within the confines of the mud ring, extending from side to side of the lirebox and from the rear sheet, 7, to the throat sheet, 1l.

rIhe iirebox-extension or barrel combustion chamber, B, is all that part of the firebox between the flue sheet, 14, and the throat sheet, 11. The floor, 16, and sides, 16, of the extension, B, join the extension, 6, of the crown sheet which forms the top of the extension. The throat sheet usually extends only to the floor of the extension. In my novel firebox it has a different form, which will be explained. p v v It will be noted that a Wooten firebox is of much less height than width. Instead of attempting to employ a refractory arch extending upwardly and rearwardly from the lower part of the throat sheet, 11, I first divide the iirebox into fire and combustion chambers by means of a vertical water wall or cross-leg positioned in the Iirebox-extension, B. I 4then construct an overhanging arch, C, -rearwardly of the wall by means of arch tubes extending therefrom and refractory bricks placed on said tubes.

vI form the cross wall or cross-leg above referred to as a vertical transverse water leg A which constitutes avertical extension of the front water leg, 12, of the boiler. On reference to Fig. 1 of the drawings it will be seen that said wall or leg, W, has its rear wall formed by a portion, 11', of the throat sheet which extends above the floor, 16, of the eX- tension, B. Its front wall, 11, is formed by a plate which rises from the floor, 16, and is spaced forward from the plate, 11. The edges of the plates, 11 and 11, are tightly seamed to the side sheets, 5, 5, and the sheets, 16, 16. The top, W', of the leg may be integral with the plates, 11', 11, but maybe more conveniently formed by a separate piece seamed thereto and to the side sheets.

It should be`especially noted that the top, W', of the water leg, W, is lowest at its middle and curves upwardly from that point to the side sheets. By constructing the wall in this" manner the water and steam are allowed to escape freely from the leg, W, into the side water legs, 8, of the boiler, an steam pocketing is avoided.

Those who are skilled in the art will understand that .the walls, 11', 11, are secured by means of staybolts which pass through them; in the same manner as the other walls of the firebox are stayed.

Obviously, both the lower part and ends of the hollow metal wall or cross leg, W, are in free communication with all of the water legs or spaces of the boiler. The bottom sheet, 16, joins the sheet, 11 and should not be attached to the sheet, 11.

The wall, W, may rise to the center of the combustion chamber, B, or even`= higher, if desired. When used alone it performs the function of partly separating the combustion chamber from the fire chamber, A. This amount of separation is not sufficient to insure the best results. Such results can only be secured through the employment of a large mass of refractory brick inthe form of an arch, C, which extends rearwardly and upwardly from the wall, W, and overhangs a portion of the grate, 15. Most conveniently this wall is composed of a large number of refractory bricks, all of a size to be passed through the fuel door,r10.

For supporting the arch bricks T employ a suilicient number of longitudinally inclined water4 circulating arch tubes, 17. These are arranged at sufficient height to afford proper fuel and fire clearance between the grate and the arch, C. As shown, the

arch tubes are spaced apart. Their lower forward ends are fastened in of the throat sheet, 11', and communicate with the interior of the wall, W. The rear ends of the arch tubes are in like manner fastened in the rear sheet, 7, near the top thereof. This arrangement affords .sufficient inclination to insure the rapid flow of water through the tubes, 17.

As best shown in Fig. 2, I prefer that all of the arch tubes shall be so positioned that their corresponding clean-out openings and plugs, 18, may be located in the forward sheet or wall,11, of the water leg, W. But

the upper part f other arrangements of the tubes may be resorted to. v.

Inniany cases it will be found desirable to provide the combustion chamber, B, with a cinder hopper and closure of the kind'set forth in my prior Patent No. 1,118,615. p

I desire it to be understood that the water. containing cross wall herein described may be used to advantage even when' the water tubes and the arch bricks are lacking. It should also be understood that the herein described wall, either with or without the arch tubes, may be installed in several types of barrel combustion chamber fireboxes and is not limited to Wooten type flreboxes, although it appears that the invention. attains its greatest utility in fireboxes of the Wooten type.

Having thus described my invention, l claim as new and desire to secure by Letters Patent r A. locomotive boiler containing a rebox having a barrel combustion chamber or extension forward of its throat sheet, in combination with the cross water leg positioned in the mouth of said extension, and 1n open the bottom and side the firebox, and there communication with water spaces or legs of lremaining a gas passage above the top of said cross water leg, a plurality of water circulating arch tubes extending upwardly and rearwardly from the approximate top of 'said cross water leg, and arefractory brick arch composed of bricks supported by said tubes, said arch extending rearwardly from said cross water leg and from side to sideof the frebox proper, substantially and as to the purpose specified.

Tn testimony whereof, 1 have hereunto set my hand this 8th day of January, 1916.

JAMES T. ANTHONY. 

